Phys.org news tagged with:equation
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en-usPhys.org internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine.What happens when a raindrop hits a puddle?Have you ever taken a walk through the rain on a warm spring day and seen that perfect puddle? You know, the one where the raindrops seem to touch down at just the right pace, causing a dance of vanishing circles?
https://phys.org/news/2019-05-raindrop-puddle.html
General Physics Fri, 10 May 2019 10:44:38 EDTnews476703870Using computers to crack open centuries-old mathematical puzzlesIn mathematics, no researcher works in true isolation. Even those who work alone use the theorems and methods of their colleagues and predecessors to develop new ideas.
https://phys.org/news/2019-04-centuries-old-mathematical-puzzles.html
Mathematics Wed, 03 Apr 2019 09:47:08 EDTnews473503624Bristol mathematician cracks Diophantine puzzleA mathematician from the University of Bristol has found a solution to part of a 64-year old mathematical problem – expressing the number 33 as the sum of three cubes.
https://phys.org/news/2019-04-bristol-mathematician-diophantine-puzzle.html
Mathematics Tue, 02 Apr 2019 07:40:04 EDTnews473409600Engineers demonstrate metamaterials that can solve equationsThe field of metamaterials involves designing complicated, composite structures, some of which can manipulate electromagnetic waves in ways that are impossible in naturally occurring materials.
https://phys.org/news/2019-03-metamaterials-equations.html
General Physics Thu, 21 Mar 2019 14:00:10 EDTnews472369451Abel Prize for maths awarded to woman for first timeWomen took another step forward in the still male-dominated world of science Tuesday, as American Karen Uhlenbeck won the Abel Prize in mathematics for her work on partial differential equations.
https://phys.org/news/2019-03-abel-prize-maths-awarded-woman.html
Mathematics Tue, 19 Mar 2019 09:13:03 EDTnews472205574Speeding up artificial intelligenceA group at Politecnico di Milano has developed an electronic circuit able to solve a system of linear equations in a single operation in the timescale of a few tens of nanoseconds. The performance of this new circuit is superior not only to classical digital computers, but also to quantum computers. It will be soon possible to develop a new generation of computing accelerators that will revolutionize the technology of artificial intelligence.
https://phys.org/news/2019-03-artificial-intelligence.html
Quantum Physics Fri, 15 Mar 2019 10:08:15 EDTnews471863285The science of knitting, unpickedDating back more than 3,000 years, knitting is an ancient form of manufacturing, but Elisabetta Matsumoto of the Georgia Institute of Technology in Atlanta believes that understanding how stitch types govern shape and stretchiness will be invaluable for designing new "tunable" materials. For instance, tissuelike flexible material could be manufactured to replace biological tissues, such as torn ligaments, with stretchiness and sizing personalized to fit each individual.
https://phys.org/news/2019-03-science-unpicked.html
General Physics Wed, 06 Mar 2019 09:17:53 EDTnews471086264Weyl goes chiralQuasiparticles that behave like massless fermions, known as Weyl fermions, have been at the center of a string of exciting findings in condensed matter physics in recent years. The group of physicist Sebastian Huber at ETH Zurich now reports experiments in which they got a handle on one of the defining properties of Weyl fermions—their chirality.
https://phys.org/news/2019-02-weyl-chiral.html
Quantum Physics Tue, 12 Feb 2019 07:45:58 EDTnews469179948Mathematician calculates parameters for optimal crowd and traffic controlA RUDN mathematician has developed a solution for a perturbed differential containment—a generalized case of a differential equation. The development will calculate optimal paths for the movement of a crowd or a flow of cars. It may also be used to manage robotic cars and multi-agent robotic systems. The results of the study were published in the Journal of Differential Equations.
https://phys.org/news/2019-02-mathematician-parameters-optimal-crowd-traffic.html
Mathematics Mon, 11 Feb 2019 09:28:56 EDTnews469099731First direct view of an electron's short, speedy trip across a borderElectrons flowing across the boundary between two materials are the foundation of many key technologies, from flash memories to batteries and solar cells. Now researchers have directly observed and clocked these tiny cross-border movements for the first time, watching as electrons raced seven-tenths of a nanometer – about the width of seven hydrogen atoms – in 100 millionths of a billionth of a second.
https://phys.org/news/2019-02-view-electron-short-speedy-border.html
General Physics Optics & Photonics Mon, 11 Feb 2019 08:50:57 EDTnews469097438Computational algorithm to reduce electromagnetic noise in electronic circuits developedIn order to design noiseless electromagnetic (EM) devices, it is necessary to clarify the mechanism behind EM noise and theoretical calculations and computer simulations are performed for prediction assessment of devices. Two researchers at Osaka University developed an algorithm for numerical calculation of EM noise (interference) in electric circuits.
https://phys.org/news/2019-01-algorithm-electromagnetic-noise-electronic-circuits.html
General Physics Thu, 31 Jan 2019 09:10:02 EDTnews468147603Mathematician calculates wave velocity for post-stroke therapyA RUDN mathematician calculated the velocity of wave propagation in the brain in the course of external stimulation. This procedure is used to treat stroke patients. To do so, the scientists generally formulated the task by creating a reaction-diffusion equation and carried out a theoretical study of it. The results of the study were published in Applied Mathematics Letters.
https://phys.org/news/2019-01-mathematician-velocity-post-stroke-therapy.html
Mathematics Wed, 23 Jan 2019 10:30:02 EDTnews467458887A mathematical approach for understanding intra-plant communicationA team of researchers at the Gran Sasso Science Institute (GSSI) and Istituto Italiano di Technologia (IIT) have devised a mathematical approach for understanding intra-plant communication. In their paper, pre-published on bioRxiv, they propose a fully coupled system of non-linear, non-autonomous discontinuous and ordinary differential equations that can accurately describe the adapting behavior and growth of a single plant, by analyzing the main stimuli affecting plant behavior.
https://phys.org/news/2019-01-mathematical-approach-intra-plant.html
Mathematics Fri, 04 Jan 2019 10:00:02 EDTnews465812629Description of rotating molecules made easyFeynman diagrams are applied in condensed matter physics. By turning highly complex equations into sets of simple diagrams, the method has established itself as one of the sharpest tools in a theoretical physicist's toolbox. Giacomo Bighin, a postdoc in the group of Mikhail Lemeshko at the Institute of Science and Technology Austria (IST Austria), has now extended the Feynman diagram technique. Originally devised for subatomic particles, the simplest objects imaginable, the technique can now work with molecules—far more complex objects. The research, which was published in the journal Physical Review Letters, is expected to drastically simplify the description of molecular rotations in solvents. This brings scientists one step closer to their long-term goal of understanding chemical reactions in solvents at the microscopic level, and potentially controlling them.
https://phys.org/news/2018-12-description-rotating-molecules-easy.html
Condensed Matter Fri, 28 Dec 2018 06:44:54 EDTnews465201885What really happens at femtosecond junctions?When beams of ultra-short laser pulses running in the same direction intersect with each other at a noticeable angle, various interactions occur between the pulses. These physical phenomena are complicated, and their mathematical description becomes computationally complex. To carry out the appropriate simulations, entire computer clusters have to be engaged. The latest version of Hussar software makes it possible to perform the calculations even on an ordinary laptop.
https://phys.org/news/2018-12-femtosecond-junctions.html
Optics & Photonics Thu, 27 Dec 2018 09:14:50 EDTnews465124482Planetary astronomers identify cycle of spectacular disturbances at Jupiter's equatorA regular pattern of unusual meteorological events at Jupiter's equator has been identified by planetary scientists at the University of Leicester.
https://phys.org/news/2018-12-planetary-astronomers-spectacular-disturbances-jupiter.html
Space Exploration Wed, 19 Dec 2018 09:00:02 EDTnews464431579Changing variable in equation used to project climate change to give more accurate estimate of precipitation changesA team of researchers from Australia and China has changed a variable used in an equation to project precipitation as the climate changes, and in so doing, has found that the planet may not become drier as many have suggested. In their paper published in Nature Climate Change, they explain their rationale for changing the variable and why they believe the equation now better represents reality. Jacob Scheff, with the University of North Carolina, offers a News and Views piece on the work done by the team in the same journal issue.
https://phys.org/news/2018-12-variable-equation-climate-accurate-precipitation.html
Environment Tue, 18 Dec 2018 09:30:44 EDTnews464347788River deep: Einstein's contribution to earth scienceAlbert Einstein is famous for a lot of reasons, but the movement of sediments in rivers is perhaps not one of them. Yet, his name is associated with those of Ackers, White, and Shields who developed equations to help explain how grainy materials transported as particles in a river move. Given the importance of sediment from the physical or chemical degradation of rocks in a waterway and the impact they have on erosion, entrainment, transportation, deposition, and compaction, it is not surprising that geologists, geographers, and others involved in understanding waterways are more than a little familiar, however.
https://phys.org/news/2018-12-river-deep-einstein-contribution-earth.html
Earth Sciences Wed, 05 Dec 2018 09:18:25 EDTnews463223896Researchers defy 19th Century law of Physics in 21st century boost for energy efficiencyResearch led by a University of Sussex scientist has turned a 156-year-old law of physics on its head in a development which could lead to more efficient recharging of batteries in cars and mobile phones.
https://phys.org/news/2018-11-defy-19th-century-law-physics.html
General Physics Wed, 21 Nov 2018 10:34:18 EDTnews462018835Astrophysicists measure precise rotation pattern of sun-like stars for the first timeSun-like stars rotate up to two and a half times faster at the equator than at higher latitudes, a finding by researchers at NYU Abu Dhabi that challenges current science on how stars rotate.
https://phys.org/news/2018-09-astrophysicists-precise-rotation-pattern-sun-like.html
Astronomy Thu, 20 Sep 2018 14:00:09 EDTnews456666134Recent tectonics on MarsThese prominent trenches were formed by faults that pulled the planet's surface apart less than 10 million years ago.
https://phys.org/news/2018-09-tectonics-mars.html
Space Exploration Thu, 20 Sep 2018 10:28:44 EDTnews456658115Linear equations system will restore impaired hand motionResearchers from the Moscow Institute of Physics and Technology have developed a model for predicting hand movement trajectories based on cortical activity: Signals are measured directly from a human brain. The predictions rely on linear models. This offloads the processor, since it requires less memory and fewer computations in comparison with neural networks. As a result, the processor can be combined with a sensor and implanted in the cranium. By simplifying the model without degrading the predictions, it becomes possible to respond to the changing brain signals. This technology could drive exoskeletons that would allow patients with impaired mobility to regain movement. The paper was published in Expert Systems with Applications, the leading journal in the field of artificial intelligence.
https://phys.org/news/2018-09-linear-equations-impaired-motion.html
Engineering Tue, 11 Sep 2018 07:50:03 EDTnews455870347Physicists experimentally verify 40-year-old fluid equationsFor decades, researchers have been using equations derived in the mid-1970s for a variety of fluid applications involving inks, foams, and bubbles, among other uses. These fundamental fluid equations describe how much force is required to pull a solid particle from a liquid surface. Although these equations have been experimentally confirmed for millimeter-sized particles, experimental confirmation in the micrometer regime has been lacking.
https://phys.org/news/2018-08-physicists-experimentally-year-old-fluid-equations.html
General Physics Condensed Matter Mon, 27 Aug 2018 09:30:01 EDTnews454558851Mathematician discusses solving a seemingly unsolvable equationAfter 10 years, Prof. Raimar Wulkenhaar from the University of Münster's Mathematical Institute and his colleague Dr. Erik Panzer from the University of Oxford have solved a mathematical equation which was considered to be unsolvable. The equation is to be used to find answers to questions posed by elementary particle physics. In this interview with Christina Heimken, Wulkenhaar looks back on the challenges encountered in looking for the formula for a solution and he explains why the work is not yet finished.
https://phys.org/news/2018-08-mathematician-discusses-seemingly-unsolvable-equation.html
Mathematics Tue, 07 Aug 2018 10:40:01 EDTnews452857046'Ribbon' wraps up mystery of Jupiter's magnetic equatorThe discovery of a dark ribbon of weak hydrogen ion emissions that encircles Jupiter has overturned previous thinking about the giant planet's magnetic equator.
https://phys.org/news/2018-07-ribbon-mystery-jupiter-magnetic-equator.html
Space Exploration Mon, 23 Jul 2018 12:21:05 EDTnews4515672513, 2, 1...liftoff! The science of launching rockets from AustraliaAustralia's space agency will officially commence operations on July 1 2018.
https://phys.org/news/2018-06-1liftoff-science-rockets-australia.html
Space Exploration Mon, 25 Jun 2018 09:10:01 EDTnews449134385New model predicts that we're probably the only advanced civilization in the observable universeThe Fermi Paradox remains a stumbling block when it comes to the search for extra-terrestrial intelligence (SETI). Named in honor of the famed physicist Enrico Fermi who first proposed it, this paradox addresses the apparent disparity between the expected probability that intelligent life is plentiful in the universe, and the apparent lack of evidence of extra-terrestrial intelligence (ETI).
https://phys.org/news/2018-06-advanced-civilization-universe.html
Astronomy Fri, 22 Jun 2018 08:50:02 EDTnews448874915Neutron stars cast light on quark matterQuark matter – an extremely dense phase of matter made up of subatomic particles called quarks – may exist at the heart of neutron stars. It can also be created for brief moments in particle colliders on Earth, such as CERN's Large Hadron Collider. But the collective behaviour of quark matter isn't easy to pin down. In a colloquium this week at CERN, Aleksi Kurkela from CERN's Theory department and the University of Stavanger, Norway, explained how neutron-star data have allowed him and his colleagues to place tight bounds on the collective behaviour of this extreme form of matter.
https://phys.org/news/2018-06-neutron-stars-quark.html
Astronomy Fri, 08 Jun 2018 08:09:00 EDTnews447664128Warm water creeps into otherwise-calm Central PacificAfter a mild La Niña late last year, temperatures, convection and rainfall rates in the equatorial Pacific Ocean returned to normal by early April of this year. An April 9 image of sea level height from the U.S./European Jason-3 satellite mission showed most of the ocean at neutral heights. But by the beginning of May, high sea levels began to build up in the Central Pacific. In the tropics, high sea levels are usually caused by a layer of warm water at or below the surface.
https://phys.org/news/2018-06-otherwise-calm-central-pacific.html
Earth Sciences Thu, 07 Jun 2018 08:33:37 EDTnews447579200Symmetry is essential for power network synchronizationA joint research team from Tokyo Institute of Technology (Tokyo Tech) and North Carolina State University has clarified the fundamental principles for achieving the synchronization of power generator groups in power networks, which is essential for the stable supply of electric power. Based on this principle, the team developed a method for constructing an aggregated model of a power network that can efficiently analyze and control the behavior of generator groups (including rotor phase angles and connection point voltages) with complex connection to a power grid.
https://phys.org/news/2018-05-symmetry-essential-power-network-synchronization.html
Energy & Green Tech Wed, 09 May 2018 06:51:33 EDTnews445067479